Re: Re: [Xen-devel] pci-passthrough in pvops causing offline raid

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Mon, Nov 15, 2010 at 05:23:09PM +0000, Mark Adams wrote:
> On Mon, Nov 15, 2010 at 12:15:44PM -0500, Konrad Rzeszutek Wilk wrote:
> > On Sun, Nov 14, 2010 at 05:15:02PM +0000, Mark Adams wrote:
> > > 
> > > On 12 Nov 2010, at 22:22, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> wrote:
> > > 
> > > > On Fri, Nov 12, 2010 at 05:10:58PM +0000, Mark Adams wrote:
> > > >> On Thu, Nov 11, 2010 at 02:06:58PM -0500, Konrad Rzeszutek Wilk wrote:
> > > >>>> I've just noticed this at the end of xm dmesg
> > > >>>> 
> > > >>>> (XEN) msi.c:715: MSI is already in use on device 02:00.0
> > > >>>> (XEN) msi.c:715: MSI is already in use on device 02:00.0
> > > >>>> (XEN) msi.c:715: MSI is already in use on device 02:00.0
> > 
> > Looking briefly at the code it means that somebody enabled the MSI
> > already on the device and did not disable them. But I wonder how
> > you got those in the first place. Did you use xen-pciback.hide (for PVOPS kernels)
> > or pciback.hide (for older kernels) to "hide" the devices away from the
> > Linux Dom0 kernel?
> 
> using xen-pciback.hide as its a pvops kernel (debian squeeze
> 2.6.32-5-27)

Ok. Then it might be worth looking in when this happens. I think
there is an argument on the Xen hyperisor line to include the time-stamp, but
I don't remember it :-(

> > Didn't you say that you had two servers and saw this problem on another
> > box too?
> > 
> > Without more details on the Xen hypervisor line or the kernel line when
> > the failure occurs I sadly can't help you.
> 
> Yes this occurs on both servers that I've tried it on. Doesn't the MSI
> log above indicate that there is a conflict - which is what ends up
> causing the device to go offline? Is there no other way to identify the

Could be, but it is unclear - it depends on when the message pops out.

But that does not help with finding out why your RAID controller goes offline.